This does not work. The iPhone cannot provide enough power to supply the screen. As far as I know, an HDMI screen can be connected with a special adapter, but not a USB-C screen.

For me, with Huawei P30, it works as long as an additional USB-C power connection is connected to the screen.

Hello, I don't think the iPhone offers the option of mirroring the screen via cable. This is probably only possible with Android.